AKPIRUO, C. E. Effect of calcium sources and particle sizes on performance characteristics, age at first egg and blood parameters of egg type chicken. Nigerian Journal of Animal Production, [S. l.], v. 47, n. 1, p. 197–207, 2020. DOI: 10.51791/njap.v47i1.230. Disponível em: https://njap.org.ng/index.php/njap/article/view/230. Acesso em: 24 jun. 2026.